// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/macros.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/resource_request_details.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/shell/browser/shell.h"
#include "net/dns/mock_host_resolver.h"
#include "net/test/embedded_test_server/embedded_test_server.h"

namespace content {

class NavigationObserver : public WebContentsObserver {
public:
    explicit NavigationObserver(WebContents* web_contents)
        : WebContentsObserver(web_contents)
    {
    }
    ~NavigationObserver() override { }

    void DidCommitProvisionalLoadForFrame(
        RenderFrameHost* render_frame_host,
        const GURL& url,
        ui::PageTransition transition_type) override
    {
        navigation_url_ = url;
    }

    void DidRedirectNavigation(NavigationHandle* handle) override
    {
        redirect_url_ = handle->GetURL();
    }

    const GURL& navigation_url() const
    {
        return navigation_url_;
    }

    const GURL& redirect_url() const
    {
        return redirect_url_;
    }

private:
    GURL redirect_url_;
    GURL navigation_url_;

    DISALLOW_COPY_AND_ASSIGN(NavigationObserver);
};

class CrossSiteRedirectorBrowserTest : public ContentBrowserTest {
public:
    CrossSiteRedirectorBrowserTest() { }
};

IN_PROC_BROWSER_TEST_F(CrossSiteRedirectorBrowserTest,
    VerifyCrossSiteRedirectURL)
{
    // Map all hosts to localhost and setup the EmbeddedTestServer for redirects.
    host_resolver()->AddRule("*", "127.0.0.1");
    SetupCrossSiteRedirector(embedded_test_server());
    ASSERT_TRUE(embedded_test_server()->Start());

    // Navigate to http://localhost:<port>/cross-site/foo.com/title2.html and
    // ensure that the redirector forwards the navigation to
    // http://foo.com:<port>/title2.html
    NavigationObserver observer(shell()->web_contents());
    NavigateToURL(
        shell(),
        embedded_test_server()->GetURL("/cross-site/foo.com/title2.html"));

    // The expectation is that the cross-site redirector will take the
    // hostname supplied in the URL and rewrite the URL. Build the
    // expected URL to ensure navigation was properly redirected.
    GURL::Replacements replace_host;
    GURL expected_url(embedded_test_server()->GetURL("/title2.html"));
    replace_host.SetHostStr("foo.com");
    expected_url = expected_url.ReplaceComponents(replace_host);

    EXPECT_EQ(expected_url, observer.navigation_url());
    EXPECT_EQ(observer.redirect_url(), observer.navigation_url());
}

} // namespace content
